We present maps of CO emission in the protoplanetary nebula Frosty Leo. Observations of the rotational transitions 12CO J = 2−1 and 1–0 have been obtained with the IRAM interferometer and the OVRO array. The molecular envelope of Frosty Leo is found to be complex and compact; most of the gas extends <∼6′′ and shows a structure that is very different to the extended optical nebula. It is compose...

We present a new 12CO(J=1–0)–line survey of the Andromeda galaxy, M 31, with the highest resolution to date (23, or 85 pc along the major axis), observed On-the-Fly with the IRAM 30-m telescope. We mapped an area of about 2 ×0. 5 which was tightly sampled on a grid of 9 with a velocity resolution of 2.6 km s−1. The r.m.s. noise in the velocity-integrated map is around 0.35 K km s−1 on the Tmb-s...

Aims. The aim of the paper is to understand the emission from the photon dominated regions in Cepheus B, estimate the column densities of neutral carbon in bulk of the gas in Cepheus B and to derive constraints on the factors which determine the abundance of neutral carbon relative to CO. Methods. This paper presents 15×15 fully sampled maps of [C ] at 492 GHz and 12CO 4–3 observed with KOSMA ...

Context. The role played by protostellar feedback in clustered star formation is still a matter of debate. In particular, protostellar outflows have been proposed as a source of turbulence in cluster-forming clumps, which may provide support against global collapse for several free-fall times. Aims. Here, we seek to test the above hypothesis in the case of the well-documented NGC 2264-C protocl...

The $^{12}$CO rotational lines in protoplanetary discs are good tracers of the total spatial extension gas component, and potentially planet-disc interactions. We present ALMA long baseline observations $^{12}$CO(2-1) line ten from Ophiuchus DIsc Survey Employing (ODISEA) project, aiming to set constraints on distribution these sources. position angle gaseous disc can be inferred for five sourc...

Context. Characterizing the evolution of protoplanetary disks is necessary to improve our understanding planet formation. Constraints on both dust and gas are needed determine dominant disk dissipation mechanisms. Aims. We aim compare masses in Chamaeleon II (Cha II) star-forming region with other regions ages between 1 10Myr. Methods. use ALMA band 6 observations (1.3 mm) survey 29 Cha II. Dus...

WC-12Co HVOF-sprayed coatings (~400 µm in thickness) reinforced with multiwalled carbon nanotubes (MWCNTs), were deposited on a steel substrate. The aim of this work is to provide and analyze data from HVOF sprayed coatings, concerning the influence addition MWCNTs their tribocorrosion performance, 3.5% NaCl electrolyte. Electrochemical (current density corrosion potential potentiodynamic polar...